Emotional Diagram

To see how potential users feel about your concepts you can ask them to fulfill an emotional diagram. To do so you need to list criteria important in your project and their opposite: for example Intuitive - and its opposite Confusing, or Funny-Serious... and place them like on the attached picture.
User can then grade each concept and it's easy to have many users giving their thoughts. You can see if the concepts fit with your brand DNA, how they do compared to their competitors and of course if they correspond to the objectives of the project.
Example of Emotional diagram.